Photocathode functionalized with a molecular cobalt catalyst for selective carbon dioxide reduction in water.

Abstract:

:Artificial photosynthesis is a vibrant field of research aiming at converting abundant, low energy molecules such as water, nitrogen or carbon dioxide into fuels or useful chemicals by means of solar energy input. Photo-electrochemical reduction of carbon dioxide is an appealing strategy, aiming at reducing the greenhouse gas into valuable products such as carbon monoxide at low or without bias voltage. Yet, in such configuration, there is no catalytic system able to produce carbon monoxide selectively in aqueous media with high activity, and using earth-abundant molecular catalyst. Upon associating a p-type Cu(In,Ga)Se2 semi-conductor with cobalt quaterpyridine complex, we herein report a photocathode complying with the aforementioned requirements. Pure carbon dioxide dissolved in aqueous solution (pH 6.8) is converted to carbon monoxide under visible light illumination with partial current density above 3 mA cm-2 and 97% selectivity, showing good stability over time.

journal_name

Nat Commun

journal_title

Nature communications

authors

Pati PB,Wang R,Boutin E,Diring S,Jobic S,Barreau N,Odobel F,Robert M

doi

10.1038/s41467-020-17125-4

subject

Has Abstract

pub_date

2020-07-13 00:00:00

pages

3499

issue

1

issn

2041-1723

pii

10.1038/s41467-020-17125-4

journal_volume

11

pub_type

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